Hydraulic cartridge.



APPLICATION fILED APR.13,1914. RENEWED NOV. 16.1914.

LMU.

D. V. SICKIVIAN.

HYDRAULIC CARTRHJGE.

Patented June 22, 1915.

guucufofc Patented June 22, 1915.

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T0 all whom, it may concern Be it known that li, Dev-r Venen ron? MAN, citizen of the United States,l residing in the city and county ot Denverand State of Colorado, have invented certain new and useful lmurovements in Hydraulic Cartridges, (Case lb and llV do declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled pertains to make and use the same, reterence being had to the accompanying drawings, and to the letters and'hgures ot reterence marked thereon, which torna a part of this speciication.

My invention relates to improvements in hydraulic cartridges, ot the' cl" s employed tor'breakin down coal and oer material in mines. his method is particularly advantageous for breaking downi'coal tor the reason that it avoids as Ytar as is possible, the formation ot slack or dust. ln coal mines, it is exceedingly desirable that as little dust as possible be formed in the mine, owing to the tact that coalv dust is an explosive. These cartridges make it practicable to break down coal in large bodies and by reason ot the :fact that water'is employed as the force which actnates the movable elements ot thecartridge, the termation ot dust is to a great degree prevented.

lin my present invention, l employ elongated pistons, preferably elli soidal in 4 shape, which are located in chamm ers oit corresponding shape which are termed in the bars or cylindrical Casin s employed in de vices ot this character. n mypresent improvement, ll have shown a cartridge in which the pistons and their corresponding chambers vary in size, the size progressively increasing trom front to rear, these terms being employed in relation to the position ot the piston when inserted in the hole termed in the coal. 'l`he pistons ma y also be unequally spaced.

'lhis invention also contemplates the forming ot the pistons ot equal size where they are unequally spaced.

llaving briefly outlined my present invention, l will proceed to describe the same in detail, reference being made tothe abcom panying drawing, in whichis ililustrated an embodiment thereof.

ln thisdrawing, l `i 1re l is 'a vertical longitudinal section taen through a can tri ge ot my improved construction. llig.' 2

pectltcatton ot Lettera Patent.

inthe artto which it ap 4 provided With a gasket or Patented d' une nl dat, neuerer inventer ie, wie. serial nel araaaa.

isan underneath view ot the same. Fig. 3 isa vlew similar to Fi 2, but showin a sllghtlymoditied formo construction. ig. 4l isa vlew similar to Figs. 2 and 3, but showing still another modlcation. Fig. 5 isa view illustrating the manner ot preparing the coal, tor instance, paratoryl to the use ot my improved cartridges for. breaking' down the same.

Illhe se reterence characters indicate the sameparts in all the views.

Let the'numeral 5 designate the body or bar ot the cartridge which is preferably cylindrical shape. Referring rst more particularly to Fi 1 and 2, the bar 5 is provided with a numr ot chambers t5, 7 and 8, the said chambers increasing progressively involume trom front to rear, the rearmost being the'largest, the 'nent in advance somewhat smaller and the' foremost smallest. This construction and arrangement ot cartridges is based on the proposition that the greatest 'torceexerted tor breaking down the coal should be at e extreme rear ofthe ening.' in which the cartridge i's located.

he logic ot this proposition will be readily understood by an' examination ot F ig. 5 ot the' drawing. 'lhese piston chambers as heretofore stated, are elon ated in sha e and the pistons 9, 10 and 11 located therein are Vot counterpart shape. lEach piston is cup leather 12,

which is somewhat larger than the area of 'the chamber, its edge being turned upwardly, as is common 1n devices ot' this class, in orderto torni a tluid tight joint between the piston and the walls ot its chamber. These gaskets are held in place by lates 1? which are secured by screws 14k. ach piston is provided at. its opposite extremities with grooves 15, adapted to receive short tongues 16 formed on stop plates 17 which are secured to the opposite extremities of the bar 5 and to the partitions separating the piston chambers by means ot securing screws 18, or other suitable fastening devices. !tt the bottoms ot the grooves 15, od"- sets 19 are formed which are adapted to engage the tongues 1G, to prevent the pistons within a mine, pre-y trom entirely escaping troia their chambers the pistons trom with this orifice 22-are ports 23, 24 and 25,

- which lead from the orifice 22 to the re- -diminish in size from cartridge. It is gressively increase from spective piston chambers. By virtue of this construction, the water will besimultaneously or approximately so, introduced into all the chambers of the cartridge, whereby the pistons are simultaneously e]ected for breaking down coal. In Figs. 1 and 2, the piston chambers are equally spaced byVv partitions 26. In Fig. 3, the pistons are of the same construction as disclosed in Figs. 1 and 2, that is to say, they progressively the rear toward the front, but they are unequally spaced. For instance, the partition separating the rearmost piston chamber from that next in advance, is shorter than that which separates the foremost piston from the one next in the rear. Attention isy called to the fact that in the cartridges illustrated in the drawing, three pistons are shown for each evident that the number of pistons may be increased"or""diminished 'as may beY required, as the invention is not limited to a particular number of pistons and counterpart chambers.

Again referring to Fig. 4 of the drawing, the pistons herein disclosed are equal in size, but unequally spaced. These pistons may be designated by the numeral 27. In this form of construction, the partition separating the rearmost -piston chamber from the one next in advance is short/er than that separating the last named chamber from the foremost chamber. From this explana* tion it will be understood that the pistons and their corresponding chambers may be unequal in size and volume. lVhere this is the case, it is preferred that they should progressively diminish from the4 rear toward the front, as it has been found advantageous to exert the greatest force upon the rerrmost part of the block or bulla of coal to be broken down in a single operation. it will also be understood that the piston chambers may be equally or unequally spaced, as may be desired. lVl'iere they are unequally spaced, the spacing should prothe rear toward the front for reasons which have been heretoo're made clear.

From the foregoing description., the manner et employing cartridges of this character forpbrealring down coal or other material in mines will. be readily understood. By reference to 5, it should be explained that preparatory te introducing the cartridge, a cavity 28 is formed underneath a block of coal .29, the said cavity being preferably pistons of counterpart. shape located in widest at its outerv extremity as shown at 30, and diminishing toward the rear. Above this block of coal, a hole 31 is bored, into which the cartridge 5 is introduced. The water is then delivered to `the cartridge through the conduit 20 and the pistons of the cartridge ejected, whereby theblock 29 of coal is broken down.

Having thus described my invention, what I claim is,

1. A hydraulic cartridge comprising a body member having chambers elongated in the direction of the length of the cartridge, and pistons in said chambers and of connterpart shape, the said pistons and chambers being progressively larger from the front to the rear of the cartridge.

2. A hydraulic cartridge comprising a body member having ellipsoidal shaped chambers, the longer axes of the chambers being lengthwise of the cartridge, and pistons of counterpart shape located in said chambers, the chambers and pistons being variably spaced from the front toward the rear of the cartridge.

3. A hydraulic cartridge comprising a body member having a number of ellipsoldal shaped chambers, the longer axes of the chambers being parallel with the longitudinal axis of the cartridge, and pistons of counterpart shape located in the said chambers, the chambers and pistons being variably spaced from the front toward the rear of the cartridge, the said spacing diminishing in degree progressively from the front toward the rear.

4. A hydraulic cartridge comprising a body member having chambers of ellipsoidal shape, the longer axes of the chambers ex tending lengthwise of the cartridge, a number oi pistons of counterpart shape located in said chambers, and the chambers diminishing in size progressively from the iront to the rear, and variably spaced from the front to the rear of the cartridge.

5. AQ hydraulic cartridge comprising a body having chambers elongated in the di rection of the length of the cartridge, pistons of counterpart shape located in the said chambers and diminishing in size progressively from front t'o rear, the chambers being variably spaced and the spacing diminishing in degree progressively from the front toward the rear of the cartridge.

G. A hydraulic cartridge comprising a body member having chambers, pistons of counterpart shape located in said chambers, the chambers and pistons being varably spaced from the front toward the rear nl' the cartridge.

7. A hydraulic cartridge comprising a body member having a number of chambers,

said chambers, the chambers and pistons being variably spaced longitudinally of thc carlll) lll

mennen trirlgea the seicl specing diminishing in degree progressively from the trent toward the renr. i

` 8., A hyrlrnulic cartridge comprising s boil member having chambers, pistons in sei chambers ot counterpart shspe,'the ssicl pistons enel chembers being progressively lnrger from one extremity ot the certrielge townrrl the other. v

9. A hyclreulic certriclge comprising n bocly member heying e number of chambers, pistons in seid chambers., the seicl pistons being ot' counterpart shape, the pistons end ehnmbers being progressivel larger from the liront towerd the resr ot t e certriclge.

l0. A hydraulic cartridge comprising s booly member barring n number ol chambers, pistons in seid chambers ot counterpart shape, the pistons snol chambers vzirying in size progressively trom one extremity to- Wnrcl the other, the chambers enel pistons being also vnriebly spaicedl longitudinally of the cartridge,

ln testimon Wbereot l( ntln my signature in presence o tivo Witnesses.

, Witnesses:

Meer: limer, it, llinnn'r Bmnn., 

